package main

import (
	"context"
	"log"
	"os"
	"os/signal"
	"syscall"

	"github.com/wormhole-foundation/wormhole-explorer/common/health"
	"github.com/wormhole-foundation/wormhole-explorer/common/logger"
	"github.com/wormhole-foundation/wormhole-explorer/common/settings"
	"github.com/wormhole-foundation/wormhole-explorer/event-watcher/config"
	"github.com/wormhole-foundation/wormhole-explorer/event-watcher/http"
	"go.uber.org/zap"
)

func main() {

	// Load config
	cfg, err := settings.LoadFromEnv[config.ServiceSettings]()
	if err != nil {
		log.Fatal("Error loading config: ", err)
	}

	// Build rootLogger
	rootLogger := logger.New("wormhole-explorer-core-contract-watcher", logger.WithLevel(cfg.LogLevel))

	// Create top-level context
	rootCtx, rootCtxCancel := context.WithCancel(context.Background())

	//TODO: this requires merging https://github.com/wormhole-foundation/wormhole-explorer/pull/590,
	// which is currently under code review.
	//
	//// Connect to MongoDB
	//rootLogger.Info("connecting to MongoDB...")
	//db, err := dbutil.Connect(rootCtx, cfg.MongodbURI, cfg.MongodbDatabase)
	//if err != nil {
	//	rootLogger.Fatal("Error connecting to MongoDB", zap.Error(err))
	//}

	// Start serving the monitoring endpoints.
	plugins := []health.Check{ /*health.Mongo(db.Database)*/ } //TODO blocked on https://github.com/wormhole-foundation/wormhole-explorer/pull/590
	server := http.NewServer(
		rootLogger,
		cfg.MonitoringPort,
		cfg.PprofEnabled,
		plugins...,
	)
	server.Start()

	// Block until we get a termination signal or the context is cancelled
	rootLogger.Info("waiting for termination signal or context cancellation...")
	sigterm := make(chan os.Signal, 1)
	signal.Notify(sigterm, syscall.SIGINT, syscall.SIGTERM)
	select {
	case <-rootCtx.Done():
		rootLogger.Warn("terminating (root context cancelled)")
	case signal := <-sigterm:
		rootLogger.Info("terminating (signal received)", zap.String("signal", signal.String()))
	}

	// Shut down gracefully
	rootLogger.Info("disconnecting from MongoDB...")
	// db.Disconnect(rootCtx) //TODO blocked on https://github.com/wormhole-foundation/wormhole-explorer/pull/590
	rootLogger.Info("cancelling root context...")
	rootCtxCancel()
	rootLogger.Info("terminated")
}